Wrought high temperature alloy



ICC

Patented Nov. 18,1958

Usually, the preferred materials will fall within ;a range 1 of composition as follows:

2,860,968 I v WROUGHT HIGH TE PERATURE- nnoy 0.0% 930% carbon Alfred L. Boegehold, Pontiac, Mich., Dean K. Hanink, chromlum Indianapolis, 11111., and Fred J. Webbere, Pontiac, Mich., 4.00.- 6.00% molybdenum assignors to General Motors Corporation, 'Detroit, 14.00-30.00% 11'011 Mich., acorporation of Delaware v 1.50- 5.00% aluminum 1.50- 2.50% titanium No Drawing. Applicahon March 14 1956 0 Serial No. 571,377

Balance n1ckel 8 Claims. -(Cl. 75122) The following is atypical example of a highly satis- This invention has to do with an improved high-temac ory alloy in accordance with the invention; perature alloy which is capable of being hot worked into any desired shape and is capable 'of withstanding pro- 5 carbon longed stress at elevated temperature. 0 10% (max) manganese The alloy of this invention is especially useful for 0 (mm) Silicon parts which have to withstand high stresses under elevated 72 14 00 17 0% chromium temperature conditions such as 1500 F. or higher and" 600% molybdenum at the same time be resistant to oxidation. The 240046007] iron alloy uses a minimum of strategic materials. The 350% aluminum material of this invention has numerous applications in 5 250% titanium gas turbines and jet engine components; some of 5.00- 6.00% aluminum and titanium combined uses for which this material is particularly useful are: 0 08% boron fabricated nozzle guide vanes, afterburner flame gutters,' I i' m nickel turbine shrouds, etc. The material of this invention in i sheet metal form has better high-temperature properties. I and much lower strategic rating than materials current- All composltlons P f mventlon have good 1 available commercially in sheet form WOIk-abllltyo at temperatures ln the range of about 1750 The composition of the material of the present invento 21 25 Th ls 15 p r c lar advantage of the tion in its broader aspects consists essentially as follows: Pmsmt mvemlon f fl mammals can b6 readfly O 03 0307 b processed from-cast ingots into wrought products such g; as bar StuCll, sheets, etc., using conventional rolling mill 6 f gi equipment. The materials have been successfully re- 4 15 p enum duced into sheets having thicknesses as low as 0.03 inch. 3 :35; The sheet materials of this invention may be hot or cold pressed or otherwise formed into desired shapes.

oaluminum 40 Th h ht kd 3 00% titanium e wroug t or o wor e ma mas 0 1s 1nven- 020% boron tlon may be subsequently solutlon treated and aged. A The material also may contain silicon ranging up to about typical treatment this purpose iljcludes hheatingf for one hour at 2075"v water quenc ing, re eating our ig g iigzii ig 3 2 f g ifi 3 25 222: hours at 1 100 F., and thereaf ter air cooling. Another rfnges between 0 05 and 030 Percent and the s ilicon t1:eatmen-t mcludas heatmg at 2000-0 for 20 minutes rangesbetween afid 0 60 percent. Best results also an coolmg, and thereafter reheatlng for 20 hours at are obtained when the iron content, is not more than 1500 about 30 percent and when the material has a boron Table A below glves the results of typical tests on test content of at least .04 percent and preferably at least bars made fro]? Wrought barstfick from dlflgrenfi heats Q06 percgnta This amount of boron substantially The Table A gives thecompositlon of the mater1als,.the proves elongation rupture and with increase in heat treat ng cond1t1ons, t1me to rupture. 1n hours, perrupture life. Amounts of iron above 30 percent cause cent elongatlon at rupture, and the test condit1ons includa decrease in high-temperature strength g temperature and $1655 mp y l F S Table A wnouon'r BAasTo'oK Heat c a v ..H0l1lS. .Percent.. No. 0 Mn Si Ni v Cr Mo Fe Al' Ti B: Condition to Eltsgnga- Test Conditions V ggigg z 2.1 1,500 F./35,000 p. s. 1. 1 .19 .05 .11 Bal. 14.7 4.35 23.9 3.57 2.23 ND gg;. a1 1,500F. a 5,0o 0 1.3.1. iiit fiiti a v 4. new F./35,000p. .1. 1 h .,'2,075 F. o 2 .19 .05 1 .11 Bal. 14.6 4.17 23.5 3.39 2.31 .041 {4-hi's., ,500F 13.8 1,500 F./35,000p. s,i. v 1 1hr., 2,07 F. 11.6 1,500 F./35,000p. a.1.. 3 .05 .14 Bel. 14.8' 4.24 26.0 2.80 2.4a .05 1m-.,2,075 F. 11.1 1,500" F./25,000p. s. 1.-

0.03-0.30% carbon 0.00-1.00% silicon 0.00-1.00% manganese 13.00-17.00% chromium 4.00-6.00% molybdenum 24.00-55.00% nickel 14.00-55.00% iron 1.50-5.00% aluminum LSD-3.00% titanium 0.01-0.20% boron 2. A wrought-metal product capable of withstanding high and prolonged stress at elevated temperature consisting essentially as follows:

6 24.00-26.0% iron 2.753.50% aluminum 1.75-2.50% titanium 5.00-6.00% aluminum and titanium combined 0.04-0.08% boron Balance nickel 6. A sheet metal product capable of withstanding high and prolonged stress at elevated temperature consisting 1o essentially as follows:

0.05-0.20% carbon 0.10% (max.) manganese 0.60% (max.) silicon 14.00-17.00% chromium 4.006.00% molybdenum 24.00-26.00% iron 2.753.50% aluminum 1.75-2.50% titanium 5.00-6.00% aluminum and titanium combined 0.04-0.08% boron Balance nickel 0.03-0.30% carbon 0.00-1.00% silicon 0.00-1.00% manganese 7. A hot rolled sheet metal capable of withstanding high and prolonged stress at elevated temperature consisting essentially as follows:

13.0017.00%chromium 4.00-6.00% molybdenum 24.0055.00% nickel l4.0055.00% iron LSD-5.00% aluminum 1.50-3.00% titanium 0.0l0.20% boron 3. The product of claim 2 which has been solution treated and aged.

4. A wrought-metal product capable of withstanding high and prolonged stress at elevated temperature consisting essentially as follows:

0.03-0.30% carbon 13.00-17.00% chromium 4.00-6.00% .molybdenum 14.00-30.00% iron 1.50-5.00% aluminum LSD-3.00% titanium 0.04-0.20% boron Balance nickel 5. An alloy capable of being hot worked and withstanding high and prolonged stress at elevated tempera tureconsisting essentially as follows:

0.05-0.20% carbon 0.10% (max.) manganese 0.60% (max.) silicon 14.00l7.00% chromium 4.00-6.00% molybdenum ODS-0.30% carbon 13.00-17.00% chromium 4.006.00% molybdenum 14.0030.00% iron LSD-5.00% aluminum 1.50-2.50% titanium 0.04-0.20% boron Balance nickel 35 8. A wrought-metal product capable of withstanding high and prolonged stress at elevated temperature consisting essentially as follows:

0.03-O.30% carbon 13.00-17.00% chromium ADO-6.00% molybdenum 14.0030.00% iron LSD-5.00% aluminum 1.50-2.50% titanium 0.06-0.08% boron Balance nickel References Cited in the file of this patent UNITED STATES PATENTS 2,343,040 Allen et al. Feb. 29, 1944 2,661,284 Nisbet Dec. 1, 1953 2,668,536 Callaway et al. Sept. 7, 1954 FOREIGN PATENTS 632,712 Great Britain Dec. 5, 1949 

0.03-0.30% CARBON 0.00-1.00% SILICON 0.00-1.00% MANGANESE 13.00-17.00% CHROMIUM 4.00-6.00% MOLYBDENUM 24.00-55.00% NICKEL 14.00-55.00% IRON 1.50-5.00% ALUMINUM 1.50-3.00% TITANIUM 0.01-0.20% BORON
 1. AN ALLOY CAPABLE OF BEING HOT WORKED AND WITHSTANDING HIGH AND PROLONGED STRESS AT ELEVATED TEMPERATURE CONSISTING ESSENTIALLY AS FOLLOWS: 